A Lion-class reconstruction follows the Tiger pattern

How should the Lion-class battlecruisers be refitted?

Replace the machinery first, then pursue a Tiger-like reconstruction with modern 14-inch guns and updated protection and secondary weapons.

The engines and boilers are the first priority because machinery determines whether an old battlecruiser can still fill a fast operational role. Modern 14-inch guns are the preferred main armament if the structure and available mountings permit them. Lion, Queen Mary, and Tiger form an evolutionary family, so their reconstruction problems are similar rather than unique. The fuller Tiger proposal supplies the model: new propulsion, modern weapons, revised protection, and an updated secondary and anti-aircraft fit.